We eagerly consume the biopics of the great queens of England — Elizabeth I, Victoria, Elizabeth II, Freddie Mercury.Yet the life of Queen Anne, who reigned from 1702 to 1714, was anything but great. Poorly schooled, cripplingly insecure and of chronically poor health, Anne died childless at age 49 having suffered 17 miscarriages and stillbirths.In “The Favourite,” director Yorgos Lanthimos (“The Lobster”) imagines a carnal, psychological and political competition between Lady Sarah Churchill, …